Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type% s/ Q1 Z+ `3 v. B5 @
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
* o6 I3 g" `5 H7 i4 M+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 5 @ W* [- [$ ], l: V* O' z: e
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
" V% r4 z' c- |! F, x3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ! P+ E2 C: K* G
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
2 o E7 g" y# y/ f( ?5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
1 S N1 I+ w& E0 W- i$ S. c2 r6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
9 R1 w* C- F1 e2 z7Kinki University School of Medicine, Osaka 589-8511, Japan
; ^: z: ^! J; F8Izumi Municipal Hospital, Osaka 594-0071, Japan
1 X5 U9 s% q; k9 ?3 F0 @9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan % X: N7 Z" K% Z
Correspondence to: Nobuyuki Yamamoto, Division of Thoracic Oncology, Shizuoka Cancer Center, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777, Japan. Tel: +81 559895222, Fax: +81 559895783, e-mail: n.yamamoto@scchr.jp ' U( ?8 i# j* {; p
AbstractBackground: The antimetabolic agent S-1 inhibits thymidylate synthase similar to pemetrexed, but through a different mechanism of action. Whether the antitumour activity of S-1 depends on histological type remains unclear. We analysed pooled data from 2 phase II clinical studies of cisplatin and S-1 in patients with previously untreated advanced non-small cell lung cancer. Patients and Methods: We comprised 110 patients with stage IIIB or IV non–small cell lung cancer. Univariate and multivariate analyses were performed to determine the effects of histological type on progression-free survival and response rates. Results: On pooled analysis of the data, according to histological type, median progression-free survival was 3.8 months in patients with squamous cell carcinoma and 4.4 months in those with non-squamous cell carcinoma. Both analyses showed that progression-free survival and response rate did not differ significantly. Conclusion: Unlike molecular targeted agents and pemetrexed, a combination of cisplatin and S-1 may be no difference in response according to histological type. 3 f$ Q1 E, m4 n: w/ r
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